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Definitions for: Collimator [n] optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
[n] a small telescope attached to a large telescope to use in setting the line of the larger one
Webster (1913) Definition: Col"li*ma`tor, n.
1. (Astron.) A telescope arranged and used to determine
errors of collimation, both vertical and horizontal.
--Nichol.
2. (Optics) A tube having a convex lens at one end and at the
other a small opening or slit which is at the principal
focus of the lens, used for producing a beam of parallel
rays; also, a lens so used.
See Also: optical device, prism spectroscope, scope, spectroscope, telescope
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